-LRB- CNN -RRB- -- This month on Road to Durban , CNN 's Robyn Curnow , Nkepile Mabuse and Ayesha Durgahee meet in Johannesburg , South Africa 's most populated city , to explore the efforts being made to cut the country 's carbon emissions .

Electricity from sugar

Nkepile Mabuse discovers how waste from the country 's largest sugar producer , Illovo Sugar , is being converted into electricity to power the company 's mills and feed the national grid . The unique process of utilizing bagasse -LRB- sugar cane fibers -RRB- and biomass as an energy source has made the mills into energy providers , as well as sustainable industries .

Miners ' homes from waste

Mabuse also discovers how waste from a coal mine in Emalahleni is being used to build affordable new homes across South Africa . Gypsum brick -- which is a by-product of the mining process -- can reduce CO2 emissions from the construction of each new house by as much as three tonnes .

Greening the deep blue

Ayesha Durgahee travels to Cape Town to find out how an aquarium is harnessing the power of the wind and sun . With an innovative vertical wind turbine and a neat solar array , renewables are helping the Two Oceans Aquarium reduce its dependence on fossil fuels .

A renewable vintage

Robyn Curnow travels to the heart of South Africa 's wine country to discover how a vineyard is exploiting renewable energy to power its production process . From growing the grapes to bottling the wine , The Villiera Vineyard in Stellenbosch just outside Cape Town , is exploiting both solar and hydroelectric power to produce some of the country 's most recognizable wines .

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November 's Road to Durban comes from South Africa

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Nkepile Mabuto visits a coal mine helping to build clean and efficient new homes

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Ayesha Durgahee discovers an aquarium harnessing the power of the wind and sun